Gear-transmission lubrication



June 10, 1930. EJALTGELT V ,7

GEAR TRANSMISSION LUBR ICATION Filed March'l l, 1928 2 Sheets-Sheet '1 IEar W 92 June 10, 1930. H. E. ALTGELT GEAR TRANSMISSION LUBRICATJfONFiled March 14, 1928 2 Sheets-Sheet 2 Patented June 10, 1930 a HERMAN E.ALreELnoF, sou'rrr BE vnQfNnIAN/a; ASSQIGNOR; YJMES E;AssIeiIMnNrs; j "roLrvuRrARM EQUIPMENT COMPANY; A- ooa'ieoaA'rIoN or :oEtAw mn 1GEAR-TRANSMISSION I LUB IoATION Application filed March 114, 1928';sendin $51,5 J

, This invention relates to a lubricatingt feature and more particularlyto the oonstriiction of a dam in the housing for maintain ng I a certainlevel of thelubricant in'the trans-,- mission compartment or housing,and permitting the lubricant inexcessj of; a, certain level to pass overthe dam.' I 7 One of the objects of the present invention is to providea novel and-improved,construe r tion-of the transmission anddifferential housing, whereby the lubricant in the'trans- 'missionhousing is maintained at a certain level therein, and all lubricant inexcess of u this level Will'fiow'into the differentialhousing. i

" whereby the power is transmitted'fromfl one ,niechanism to the other,and thel br'icant supplied from the differentialcompartment to thetransmission compartment, and'by rea:

son oflthis construction, all lubricant in excess of a. certain level inthe transmission com partment will flow into the difierentialcompartment. r

These and, other objects ar e accomplished I power shaftis journalledfinA suitable fantil by providing a constructionandIa-n arrange ment oflBlIGJVaHOHS parts n the manner hereinafter descrlbed. j r 7 Referringto the drawings, Fig. 1is-a; horizontal cross sectional view of thetrans-- mission and differential housing together With the respectivemechanism mounted" therein, showing one embodiment of my im I respectivegears 23, 2L2incl25 Mounted-ion I one end ;of thesupplementaltransmission shaft-{16,adjac-ent the gearl23is areverse'ge'ar I .26',,whichxis adapted through the operation of 7another gear (not shown) for reversing the 'movernent of theivehiclein amanner Well I differential compart- :9

' proved lubricating-coiistruction between the respective"ldlfl'ielelltlill and transmission mechanism compartments;

v Fig, 2 is a fr agmentar'y side elevational v ew partly 1n crosssectiojmof the mechanismshoyvn in Fig.-'1. r .t

Fig. 3 is a fragmentary perspective view 1 showing the construction ofthe recess and the 1 lubricant dam located between the respectivecompartments of the transmission and differ ential mechanism, and p 7Fig. 4 is a fragmentary front elevational View}: partly crosssectionytaken ions the a further object ofjthe invention'is toipro V*vide a novel d i p ve constructio of a two transmission shaftsthe'sfirstshaft 1 5 be; 1

recessedpartition Wall ,located betvveen the housing for thetransmission mechanism, and

v I second shaft 16 being a supplemental-trans 20 the housing for thedifferential mechanism;

mission shaft; both of Which are arranged v parallel-to eacli other, andoccupy a s-men l o F g-2, shsw n i ezr ces d p titio'jnwall' and,lubricant damwshovvn j in illustrating one form bf iy have shown thesame in connection W'itha transmissionan d differentialhousing gener ially referred to by referencecharacter 10 ,516

amotorvehicle; This transmissionjand dif- *ife rentia l-housing ispreferably divided'into two compartmentsa transmission compa-rtand adiiferential coinpartmentindicated by in suitable vanti-frictionbearings g ana 14 f secured to the sidewallsofthe housing are if ing aprimary transmission shaft, I and, {the transversely With respect to the'loiigitudinal 1 1 axis of the housing. The p'rimary transmission housng 15 is geared to and operativel-y v ;driven by the main power shaftj17througlu ithe medium of the bevel -gears118', v Y f'vvliich I is{secure'd'to the mainpower shaft 17,

and the other of Which'is secured tothejpri "one of mar'ytransmissionshafts 15.; The main friction bearingsul9 mounted in suitabletra'nsverse walls of the housing'll). ,Slidably mounted gen'thetra'nsmission shaft 15 are changepeed gears 20, '21and 22. Secured vto the" supplemental .itl' ansniiss foli: shaft 16,

respective change speed, gears 20,. 21-;an

understood in the art;

J ournalled in the ment'12 of the housing 10 on suitable antifrictionbearings27 mounted in the opposite sidewalls thereof, is a differentialshaft 28.

Mountedion the ,differeritialshaft is a difl'er- I: V entialmechanism;129s (only-I part of r 60' ment as indicated hy'referencecharacter 11,"- I

shown), and whicl1 in turn is operatively geared to the bevel gears 30.The bevel gears 30 have formed integrally therewith, spur gears 31 whichin turn mesh with and operative-ly drive the main drive gears 32 which'are'se'cured 'to'the inner ends of the rear axles I (not shown).

Meshing with the differential ring gear 33 and operatively driventhereby is a pinion 113d, which is secured to the sup plemental:transmission shaft 16 between the gears 23 and 24. For a more completedescription ;of the transmission mechanism,

herein described, see my co-pending application Serial No. 26O,87 1,filed 12th" day of" March, 1928.

of, as well as the bearings are suliiciently lubice It is also essentialto the eflicient operation and to the proper lubrication of thetransmission mechanism, that the lubricant be'supplied thereto and that.all oil in excess of the required amount beldischarged therei r from. Inorder to accomplish these" results,

" I have provided a novel construction of a recessed partitionwall andadam constructio between the transmission and differenitial co'mpartmentswhich simplifies the coni t structionfformaintainingtheproperlevel'of'jl'ubricant in the transmission mechanism.

This comprises a transversely 'extending :partition wall 35 between thetransmission ,conipart'ment ll'and the difi'erenti'alcompartnient1112fBoth sides of this wall extend inwardly toward the longitudinalcenter ofthe housing toa point adjacent the differential L ring gear 33,andthence extends at frightanglesfforwardly as shown at 36, so as toform a recess. The forwardly extending Qlojngislon mechanism willoverflow the dam and be tudinalwalls or recessedportions are connectedtogetherby'a transverse dam 3?. This idam 37 is-located at apointslightly forward of thesupp'lemental transmisison shaft'l6. 1 Theforwardly e'rtending recessed portions 36have their portions above theclam 37 out away as shown at 3 8 soas to {encircle'the shaft andth'e hubof the gears The l i upper portion of these side walls' 36 are invclined upWardlyasshown at39an'dterminate l at: the opposite bearingportions 40, which i fo f l bearing [for the shaft ilgof thesteeringsector42, This recess formed by the lonthe space just below thetransmission pinion 34 on the, transmission shaft 16, so that all thegears mounted on the primary transmission shaft 15 and the supplementaltransmission sh ft 16 are P i y submeigedinthe lubricant which will bemaintained at sublubricant'in excess of the level of the top of the dam37 will overflow the dam and run back into the differential compartment.Adj acent the top and to the roar of the forwardly projecting recessedwalls 36 is a transverse reinforcing web 43 which strengthens thisportion of the housing, and is located at a'suflicient height to clearthe teeth 33 of the differential mechanism.

In the operation of the above described de' vice itwillbe obvious thatas the dil'ierential mechanism revolves in the direction indicated bythe arrow in Fig. 2, that the lubricant contained in the differentialcompartment will be elevated or' conveyed by the gear teeth with aportion thereof transferred to the pinion 34 of the supplementaltransmission shaft'lfi, and that by reason of the rapid rotaiti'on'ofthis pinion 34 the lubricant will be discharged over the dam 37 and intothe transmission compartment 11, and when the level ofthe lubricant inthe transmission compartmentreaches substantially the height of "the dam37 it will flow overthe dam back into the lower portion of thedifferential compartment. This operation will be continuous andmaintainedso that the gears as well as the bearings located in thetransmission com partmentwill receive the required lubricatio'n. I

It will be seen that by so constructing the fpartiti' on wall betweenthe transmission com- "partment and the differential compartment [byrecessing the .same beneath the power pinion which engages thedifferential ring "gear, that I have simplified the constructionreturned to the differential compartment. lVhile in the abovespecification I have described one embodiment which my invention mayassume in practise, it will of course be understood that the same iscapable of modilication and that modification may be made withoutdeparting from the spirit and scope of the invention as expressed in thefollowing claims. I What I claim is my invention and desire to secure byLetters Patent is:

i V I 1 In combination with a power transmisgit'udinally extendingwalls36and the dam "37 surrounds "or embraces, or rather occupies sionmechanism and a differential mechanism, a housing for both of saidmechanisms, a partition wall dividing said housing into a transmissioncompartment and a differential compartment, a power transmission shaftand gearing mechanism mounted in, said transmission compartment, adifferential p p gear mechanism mounted in said differential stantia llythe height of the dam 37,1 and any compartment and gearedto saidtransmission mechanism, said partition wall having a recant in saidtransmission compartment 4,

2. In a lubricating device, the combination 1 cess portionextending'beneath one of "the-- gears on one of saidtransmissionshafts,and

a dam formed as a part of said recessed partition wall formaintaining'sufficientflubriwith a power transniissionand differentialhousing comprising a transverse Wall divid I ing said housing into atransmission compartment' and a differential compartment, a transmissionmechanism mounted on said first named compartment, and a differentialmechanism mounted in said" second named -compartment and operativelyrelated to said transmission mechanism, and a dam located under andaround one of said transmission gears and connected with the saidpartition wall for maintaining acertain level of lubricant in saidtransmission compartment.

3. In a lubricating device, the combination with atransmission anddifierential' housing,

' partments, a transmission mechanism located of a power transmissionmechanism, a part-1- tion wall dividing said housing into two comin onecompartment, a differential mechanism located in the other compartmentand operatively related to said transmission. mechanism, and a dampartially surrounding one of the gears on said transmission mechanismand connected w th. said partition Wall for maintaining a certain-levelof lubricantin said transmission'compartmentQ I 4-; In a lubricatingdevice, the combination with a housing foria: transmission andfdif-'ferential mechanism, a partit on wall' substantially dividing saidhousing into two compartments, a transmission mechanism in cluding aplurality of gears mounted in one of the compartments, a differentialmechanism mounted in the other compartment and.

operatively related to said transmission mechanism, and a recessed damlocated below one of the gears of said'transmission mechanism andconnected with said partition wall for maintaining a certain-level oflubricant in said transmission compartment.

5. In a lubricating device, the combination with a transmission anddifferential housing,

' a partition wall substantiallydividing said mechanism, and a damconnected with; and:

housing intotwo compartments', a plurality of parallel and transverselyextending trans mission shafts mounted inone' of said com partments andhaving 'a plurality of gears mounted thereon, a differential mechanismmounted in the other said compartment and operatively related to saidtransmission inset forwardly of said partition wall below one of saidtransmission shafts for maintaining the lubricant in said transmissioncompartment at a certain level. w I

6. In a lubricating device, the combinat on of a transmission anddifferential housing,

a partition wall substantially dividing said housing into two.compartments, one of said compartments being glocat edlata higlier'levelthan the other "said "compartment, a. .trans-' missionmechanismincluding a plurality of 'shaft'sfand gears mounted in-theelevated.coin-' ipartmentf adifferential-mechanism opera-- 'ti'velyrelated to said transmission mechanism and mountedirr'th'e':loweryeompartment, and j i a dam-locatedforwardly and belowone oft-he gearson I said shaft and connected with said partition wallwhereby the lubricant in: the l {lower'compartment is elevated-fby thedifi'er- V entialmec'han-i'sm to-"-,the."gear operatively, connectedtherewith and .dischargediover said darn.

7. "In a lubricating deviceythe of atransmissionand differential.h'ousiiig',- a

partitiOn'WaIl dividing fsaid housin'gin to two compartments, atransmission mechatnism mounted'in one 'of said compartments. comprisinga transmission shaft and a sup-.

plemental shaft operatively connectedther'eg;

with, a differential mechanismi mounted in the other of saidcompartmentsand operatively related to said supplemental trans missionshaft, and a dam located in the bot-i tom of ,said transmissioncompartment between said transmission shaft andsaid supplementaltransmission shaft and connected with said partition wall formaintaining a certain level of lubricant in said transmissioncompartment.

8. Ina lubricating said housing being divided into two compartments, atransmission mechanism including a primary and supplemental transmissionN device, the combination withatransinission and differential housing,

iooi

shaft, a plurality of gears mounted on each of said shafts, adifferential mechanism mounted in the other of said compartments andgeared to one of the gears on said supple mental shaft, and-a damextending around 7 the said last named gear for'maintaining a, j

certainlevel of lubricantin said transmission compartment.

9. In a l bricating device, the combination:

vwith a transmission and differential housing,

said housing being divided into substantially two compartments,atransmissionmechanism including aprimary and supplemental ltransmission shaft, a plurality of gears-a mounted on each of-saidshafts, a differential mechanism mounted in the other of saidicompartments, and geared to one of thege'ars of vsaid supplementalshaft,and a dambetw'een' the said two compartments and-surrounding thesaid-last named gear, wherebythe lubricantin said differentialcompartment is elevatedEby the ring gearqof said-differential mechanismthrough the gear on saidsupplemental shaft from whereit is dischargedover; said dam into said transmission cor'np'a'rtmerit.

10.'In a-lubricating device, the combination with a transmissionanddiiferential housing, said housing being divided into sub- 1.

stwritiwl'ly bfivo compartments; a' transmission mechanism cmmprising aprimary and sup pleme'nbafi fira nsmissibn shaft: mountedin o'ne of saidflcompwrtments; a plurality of change L- Speed: gears mounfieb on saidshafts and axiaptkto be, operatively connect-ed together, a; d'rive'piniommounbed onsaid supplemental 'sliufb a' differentialmechanismmountecl in sadddifierentiai' comparfimenfi, and-open m Uive'ly (imiven'by said drive-'pinion a dam V embl acing' thelowerp'orbion: of: said drive pinion-"for maintaining a Certain level of'lubricant'inl said firansmission: c'empa-rbment. In testimony whereof Ihave signed my na me tb' th-isv specification; on" this .lOfih dayofManch, A. D-i 1928. v

V I HERMAN E. ALTGELT..

